Indication of the speed of moving vehicles.



s. M. GOLMAN. INDICATION OF THE SPEED OF MOVING VEHICLES.

APPLIGATION FILED MAY 24, 1909.

Patented Apr. 1, 1913 PATENT owe a.

STUART MILL COLMAN,-

or LONDON, ENGLAND.

INDICATION OF THE SPEED OF MOVING- VEHICLES.

' Application filed May 24,

or increasing or decreasing its speed.

it is well known that-vehicles have been I provided with devices to show to the occupant the speed at whiclithe vehicle is traveling and it. has also been proposed tosound a hell or other alarm at the conclusion of say every mile traveiiscd whereby the occupant may compute the speed, but according to this invention'the vehicle carries a device that gives to-an outside observer a visible signal every time the vehicle lias'traversed a pre-. determined distance, so that such observer can bytiming the intervals between the signals ascertain the speed of the vehicle.

One form of apparatus adapted to measure the speed of vehicles according to this invention is shown in the accompanying drawings in which Figure l is a perspective view showing one of the steering wheels of a motor-car and.

=1 the method of applying the apparatus: Fig.

' painted white on both sides or faces'so that 2 shows'on a larger scale a lamp with an indicating device attached.

Like letters indicate like parts throughout the drawings. I

Pivoted in front of a lamp A that may be attached in front of the dasliboard of the vehicle is a disk B, arranged to rotate on a lire approximately parallel with the plane of the aces thereof. The disk is geared by for instance by a worm shaft receives motion from the steering wheel D bf the vehicle by means of a toothed wheel E that is secured to the steering wheel and a smaller wheel E that meshes with thewheel El. t The wheel E is carried by a spindle that is supported in' a bearing E and the spindle may be connected direct to the flexible shaft C. The disk B may be duringthe day every half revolution will be Specification of Letters Patent 'of time is that the observer can give the 'ator. divided his attention easily counted'as the full face of the disk is Patented Apr. 1, 1913. 1909. Serial no. 498,077.

presented to the observer. The disk is more over of such dimensions as to cover the lens of the lamp and consequently at night the rays of the lamp are intercepted at. every half revolution. It will be easily seen that the speed at which the vehicle traveling can be readily ascertained by an observer who times the intervals between somany half or complete revolutions, provided .he

knows the number of IQVOlUtlOIlS-tlltlt indicate a given distance traversed. To; avoid counting a number of signals, however, the

with a comparatively long interval between them so that all that is necessary is to time, by means of an ordinary stop watch, the interval between two or more consecutive signals. A convenient number of signals for this purpose may be 30 or better still 32 to the mile. If the latter number be used 4 signaled intervals will then correspond to a furlorig, Also 32 signals to the mile make a convenient division for the kilometer.

' Instead of the disk being constantly rotated it -may be movedintermittently, if desired, and it will be understood that various alterations may be made in details of construct-ion without departing from the spirit of this invention.

One considerable advantage in employing afew signals per mile and timing the intervals between them instead of a number of signals compared against a given period whole of'his attention to the signals, whereas with a given time; limit the stop-'w-atch 1 would need to give "some signal at the close of-the time limit or a second person would be required. for this purpose, unlessthe oper between the signals and the watch. Stop-watches giving a direct reading in 'miles per-hour, or graduated to give a reading after a certainnumber of seconds have elapsed are well known. 100

The device may be used for any form of 7 movin' vehicle and may be actuatedfrom i the driving shaft; of a motor vehicle or one of the road wheels of-a motor or other vehicle in order that the police-may be able to ascertainf'with certainty the speed of travel of any vehicle. y

' What I claim as my invention and desire to secure by Letters Patent is:'

A. speed indicating device for automobiles, 1

comprising alamp, brackets having journal boxes therein connected to the lamp, a. disk apparatus may be arranged to give signals having spin61es connectedtofitswdge j'our In testimony, wheree'f I have signed"my naked in smcybmies, a Worm-Wheel connected name to this specification in the presence of 10 is one 0% said spindiles, a, WOTIH journalel in two subscribing witnesses. (me of t e brackets meshing with the wormm L wheel, gearing connected to one Of the I LUARTML COLMALY' V wheels of the eutomebile, uncle, flexible shaft Witnesses:

connected to sand warm and the geanngg' YWMJJNO. TENNA'N'L,

substantially as described. HARRY B. BRIDGE. 

